The hex color #3EC4C2 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C13B3D. The grayscale version is
#979797. A 20% lighter version of the original color is
#71F7F5, and Hex
#0B918F is the 20% darker color. If the color is saturated by 10%, you get
#35C9C6. If the color is desaturated by 10%, the color
#47BFBE is obtained.